Steam-boiler.



No. 653,810. Patented July I7, :900.

E. KENDALL.

STEAM BILER.

(Application filed Apr. 24, 1900.

3 SheetSI-Sheet l,

(No Model.)

ma mums versus co. Pucmxuwo. wnsHmmou. u. c.

3 Sheets-Sheet 2,

Patented luly I7, |900.

E.. KENDALL. STEAM BOILER.

(Application led Apr. 24, 1900.1

(No Model.)

No. 653,8l0. Patented July I7, |900. E. KENDALL.

STEAM BOILEB.

(Application filed Apn 24, 1900.)

3 Sheets-Sheet 3,

m'trzesses: lwenor:

, Edwardrendazz,

, z AMJML ma Houma Pneus no4 Puo-mums, wnsnmcmu, n. c.

llnTTnn STATES PATENT EDWARD' I ENDALL, oir-CAMBRIDGE, MASSACHUSETTS.

STEAM-soiree. ,Y

sPnorFroA'rroN forming partpf Letters Patent No. 653,810, dated .Tiny 17, ieoo.

Application led April 24, 1900. Serial No. 14.076. (No model.)

T0 @ZZ whom, ritmo/y concern:

Be it known that I, EDWARD KENDALL, of Cambridge, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Steam-Boilers, of which the following, taken in connection with the accompanying drawings, is a specification.

My invention relates to steam-boilers and to that particular class of such boilers as are termed water-tube boilers; and it consists in certain novel features of construction, arrangement, and combination of parts, which will be readily understood by reference to the description of the accompanying drawings,

and to the claims hereto appended, and in which my invention is clearly pointed out.

Figure 1 of the'drawings is a cent-ral longitudinal and vertical section of a water-tube steam-boiler embodying my invention. Fig. 2 is a transverse vertical sectionY ou line rc on Fig. 1. Fig'. 3 is a partial section on line y y on Fig. 4 looking toward the right of said igure and drawn to an enlarged scale. Fig. 4 is a section through the walls of the rear water-leg and a portion of one water-tube on line z .e on Fig. 3. Fig is a partial sectional elevation, the cutting plane being on line w vw on Fig. 6, looking toward the left of said gure. Fig. 6 is a section through the wall of the rear water-leg on line v o on Fig. 5 and showing a portion of the fire-tubes in eleva tion, with one partly in section.

In the drawings, 1 represents the brick setting; 2, the bridge-wall; 3, the tire-pot; 4, the grate; 5, the ash-pit, and 6 the metal shell, made rectangular in form and stitened by the angle-irons 7, as shown in Figs. 1 and 2.

The shell Gis inclined downward toward the rear, as shown in Fig. 1, and has secured to its inner surface by bolts 8, carrying washers 9 at their inner ends, a lining 10, of tirebrick, lire-clay, or other similar protective material,said washers being embedded in said lining material, as shown in Figs. 1 and 2.

The front end of the boiler is provided with a water-leg 11, which extends above the top ofthe shell or casing 6 and communicates at its upper portion wit-h the front end ot' the steam-drum 12, arranged centrally above the main body of the boiler in a horizontal position, as shown in Figs. 1 and 2. The rear end of the boiler is provided with the water-leg 13, which extends above the top of the shell 6 and is connected at its upper end with the interior oflsaid steam-drum at its rear end by the pipe 14. Aseries of water-'tubes 15 are set in the inner wall of each water-leg 11 and 13, so as to form a series of free communications between said water-legs. The outer plate of each water-leg 11 and 13 has formed therein a series of circular openings corre'- sponding to the number of the water-tubes 15 and in axial line therewith,said openings having diameters slightly greater than the diameters of said tubes, so that said tubes may be passed through said outer plate and be set in the inner plate by means of expanding-tools operated through said openings. The openings 'in said outer plates are threaded and have screwed therein the screw-plugs 1G, as shown in Fig. 1. The tubes 15 are arranged in vertical and horizontal rows, as shown in Fig. 2, and the two plates of the front water-leg 11 are connected together by staybolts l17, arranged in vertical and horizontal rows between the rows of tubes 15. The two plates forming the walls of the water-leg 13 are connected together by a corresponding number of tubular stays 18, set in vertical and horizontal rows alternating with the rows of water-tubes 15, as shown in Figs. 2, 3, 4, 5, and 6, said tubes 18 forming fire tubes or passages for the products of combustion from the interior of the co mb ustion-ch amber to the uptake or passage to the chimney, only aportion of one wall of which uptake is shown at 19 in Fig. 1. By this construction and arrangement of fire-tubes through the rear water-leg of the boiler the draft is so distributed as to cause the products of combustion to be much more evenly distributed among the water-tubes than heretofore, whereby a considerable increase in steam production is obtained. Another advantageof this arrangement ot' the water and fire tubes is that the exteriors of the waterltubes maybe readily cleaned by a suitable tool inserted through said fire-tubes. y Y Y An inclined plate 2O extends from the bridge-wall to and is secured to or forms the bottom of the uptake, and 21 is a damper hinged to the bottom of the rear water-leg 13 and serves as a means of regulating the IOO amount of draft through the dre-tubes 18 by moving it more or less about its pivotal connection to said water-leg by means of the lever 22. A pair of baille-plates 23 extend transversely across the drum l2 at about equal distances from each end of said drum and from each other, said plates having a width less than the diameter of said drum and so arranged therein as to leave a space between 1o its upp'er edge and the inner surface of said drum and a similar space between its llower edge and the inner surface ot' the bottom of said drum, as shown in Figs. l and 2.

The drum l2 is provided with a manhole I5 24 of ordinary construction, with a steam :dis-

charge nozzle 25, and with the curved disk 26, v-suspended a short distance below said discharge-nozzle for the purpose of preventing y priming or carrying of the water over intothe 2o enginev with the steam.

The feed-water is introduced into the rear water-leg through the pipe 27. (See Figs. l Y-and 2.)

' The operation of my invention will be read- -ilyunderstood from the foregoing without fur- 2 ther explanation here.

What I claim as new, and'desire to secure by Letters Patent ot the United States, isl. In a water-tube'steam-boiler the combifnation of a shell or casing having its top inclined downward toward its rear and having a'water-leg at its front and'rear ends 5 ya series ot :inclined water-tubes arranged in vertical 1 tand `horizontal rows, set in tube-sheets forin- -ing the inner walls of said waterlegs; a corresponding series of openings in the outer -wal1s of said water-legs having diameters at least' equal to the exterior diameters of said Awater-tubes, and in axial line with said-water- 4o` tubes; a series of removable screw-plugs closf fing said openings; a horizontal cylindrical drum located above said shell or casing and l communicating at its front end with the frontV `water-leg; and a pipe connecting the interior of the'rear end of said drum with the interior of the rear waterleg.

2. Thev combination, in a steam-boiler of a shell or casin g made rectangular in cross-secn-tionA and inclined downward toward its rear 5o end and kprovided with a water-leg at its front,

and at its rear end; a series of inclined water-tubes arranged in vertical and horizontal rows, and set in tube-sheets which form the inner walls of said water-legs; a correspondingfseries of openings in the-outer walls of -each water eleg, having diameters at least the outerface of the outerwall of said rear water-leg said fire-tubes being arranged in vertical and horizontal rows alternating with the Vertical and horizontal rows of said watertubes.

3. The combination in a steam-boiler, of a metallic shell or casing the crown-sheet of which is inclined downward toward its rear end and having water-legs at its front and rear ends, both side walls of each of 'which have formed therein a series ofA openings arranged in vertical `and horizontalrow-sand in axial line with each other; Aa corresponding series ofl inclined water-tubes set inthe inner walls of said water-legs; a corresponding series of removableV screw-plugs closing the openings in the outer wall of eachwaterleg; a series of short 'iretubes' extending only through the 'reanwater-leg and firmly set inthe inner and outerwalls Vth'ereot",fand arranged inf rows Aalternating with Vthevertical and horizontal rows of said 'water-tubes; a passage beneath said rear .water-ileggiand a damper constructed and arranged tof close 01 open said passage.

' 4. The combination in'asteamboiler of a shell or casing the crown-sheet otiwhich is inclined downward toward its rear.i endfland having water-legs at its frontand'rearends both side walls of which legs-have formed therein a series of vopenings or perforations arranged in vertical and horizontal rows,'-and in axial line with eachother; 'a corresponding series of inclinedwater-tubes set'in-the open-ings in the inner or tube vsheets ofwsaid water-legs; a cylindrical drum arranged in a horizontal position `above said casing,rwith its axis coinciding vapproximately to th'e'nor- -mal waterlline of theboiler; and alplurality of baffle-plates extend-ing transversely across said drum but of lessheight than thefdiameter of said drum, as shown.

In testimony whereof I 4have -signed my name to this specification, in the presence of two subscribing witnesses, on this 21st day of April, A. D. 1900.

EDWARD KENDALL. Witnesses:

N. C. LOMBARD, J. HOUSTON STEvENsoN.

IOO 

